Improve resource support. Implemenation of resource in-memory file sy…

…stem.

substratevm/mx.substratevm/suite.py

@@ -206,6 +206,7 @@
                     "jdk.internal.module",
                     "jdk.internal.misc",
                     "jdk.internal.logger",
+                    "jdk.internal.loader",
                     "sun.util.resources",
                     "sun.text.spi",
                     "jdk.internal.perf",

substratevm/src/com.oracle.svm.core.jdk11/src/com/oracle/svm/core/jdk/JDKVersionSpecificResourceBuilder.java

@@ -0,0 +1,66 @@
+/*
+ * Copyright (c) 2021, 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package com.oracle.svm.core.jdk;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URL;
+import java.net.URLConnection;
+
+public class JDKVersionSpecificResourceBuilder {
+
+    public static Object buildResource(String name, URL url, URLConnection urlConnection) {
+        return new jdk.internal.loader.Resource() {
+
+            @Override
+            public String getName() {
+                return name;
+            }
+
+            @Override
+            public URL getURL() {
+                return url;
+            }
+
+            @Override
+            public URL getCodeSourceURL() {
+                // We are deleting resource URL class path during native image build,
+                // so in runtime we don't have this information.
+                return null;
+            }
+
+            @Override
+            public InputStream getInputStream() throws IOException {
+                return urlConnection.getInputStream();
+            }
+
+            @Override
+            public int getContentLength() throws IOException {
+                return urlConnection.getContentLength();
+            }
+        };
+    }
+}

substratevm/src/com.oracle.svm.core.jdk8/src/com/oracle/svm/core/jdk/JDKVersionSpecificResourceBuilder.java

@@ -0,0 +1,64 @@
+/*
+ * Copyright (c) 2021, 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package com.oracle.svm.core.jdk;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URL;
+import java.net.URLConnection;
+
+public class JDKVersionSpecificResourceBuilder {
+
+    public static Object buildResource(String name, URL url, URLConnection urlConnection) {
+        return new sun.misc.Resource() {
+
+            @Override
+            public String getName() {
+                return name;
+            }
+
+            @Override
+            public URL getURL() {
+                return url;
+            }
+
+            @Override
+            public URL getCodeSourceURL() {
+                return null;
+            }
+
+            @Override
+            public InputStream getInputStream() throws IOException {
+                return urlConnection.getInputStream();
+            }
+
+            @Override
+            public int getContentLength() throws IOException {
+                return urlConnection.getContentLength();
+            }
+        };
+    }
+}

substratevm/src/com.oracle.svm.core/src/META-INF/services/java.nio.file.spi.FileSystemProvider

@@ -0,0 +1 @@
+com.oracle.svm.core.jdk.resources.NativeImageResourceFileSystemProvider

substratevm/src/com.oracle.svm.core/src/com/oracle/svm/core/hub/DynamicHub.java

@@ -26,7 +26,6 @@
 
 //Checkstyle: allow reflection
 
-import java.io.ByteArrayInputStream;
 import java.io.File;
 import java.io.InputStream;
 import java.io.Serializable;
@@ -81,7 +80,6 @@
 import com.oracle.svm.core.jdk.JDK16OrLater;
 import com.oracle.svm.core.jdk.JDK8OrEarlier;
 import com.oracle.svm.core.jdk.Package_jdk_internal_reflect;
-import com.oracle.svm.core.jdk.Resources;
 import com.oracle.svm.core.jdk.Target_java_lang_Module;
 import com.oracle.svm.core.jdk.Target_jdk_internal_reflect_Reflection;
 import com.oracle.svm.core.meta.SharedType;
@@ -720,34 +718,18 @@ public Enum<?>[] getEnumConstantsShared() {
         return (Enum<?>[]) enumConstantsReference;
     }
 
-    @Substitute
-    private InputStream getResourceAsStream(String resourceName) {
-        final String path = resolveName(getName(), resourceName);
-        List<byte[]> arr = Resources.get(path);
-        return arr == null ? null : new ByteArrayInputStream(arr.get(0));
-    }
+    @KeepOriginal
+    public native URL getResource(String resourceName);
 
-    @Substitute
-    private URL getResource(String resourceName) {
-        final String path = resolveName(getName(), resourceName);
-        List<byte[]> arr = Resources.get(path);
-        return arr == null ? null : Resources.createURL(path, arr.get(0));
-    }
+    @KeepOriginal
+    public native InputStream getResourceAsStream(String resourceName);
 
-    private String resolveName(String baseName, String resourceName) {
-        if (resourceName == null) {
-            return resourceName;
-        }
-        if (resourceName.startsWith("/")) {
-            return resourceName.substring(1);
-        }
-        int index = baseName.lastIndexOf('.');
-        if (index != -1) {
-            return baseName.substring(0, index).replace('.', '/') + "/" + resourceName;
-        } else {
-            return resourceName;
-        }
-    }
+    @KeepOriginal
+    private native String resolveName(String resourceName);
+
+    @KeepOriginal
+    @TargetElement(name = "isOpenToCaller", onlyWith = JDK11OrLater.class)
+    private native boolean isOpenToCaller(String resourceName, Class<?> caller);
 
     @KeepOriginal
     private native ClassLoader getClassLoader();

substratevm/src/com.oracle.svm.core/src/com/oracle/svm/core/jdk/JDKVersionSpecificResourceBuilder.java

@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2021, 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package com.oracle.svm.core.jdk;
+
+import java.net.URL;
+import java.net.URLConnection;
+
+public class JDKVersionSpecificResourceBuilder {
+
+    @SuppressWarnings("unused")
+    public static Object buildResource(String name, URL url, URLConnection urlConnection) {
+        return null;
+    }
+}

substratevm/src/com.oracle.svm.core/src/com/oracle/svm/core/jdk/JavaLangSubstitutions.java

@@ -29,11 +29,9 @@
 import static com.oracle.svm.core.snippets.KnownIntrinsics.readHub;
 
 import java.io.File;
-import java.io.IOException;
 import java.io.InputStream;
 import java.io.PrintStream;
 import java.net.URL;
-import java.util.Enumeration;
 import java.util.Map;
 import java.util.Properties;
 import java.util.concurrent.ConcurrentHashMap;
@@ -726,28 +724,6 @@ private static boolean hasClassPath() {
         return true;
     }
 
-    @SuppressWarnings("unused")
-    @Substitute
-    private static URL findResource(String mn, String name) {
-        return ClassLoader.getSystemClassLoader().getResource(name);
-    }
-
-    @SuppressWarnings("unused")
-    @Substitute
-    private static InputStream findResourceAsStream(String mn, String name) {
-        return ClassLoader.getSystemClassLoader().getResourceAsStream(name);
-    }
-
-    @Substitute
-    private static URL findResource(String name) {
-        return ClassLoader.getSystemClassLoader().getResource(name);
-    }
-
-    @Substitute
-    private static Enumeration<URL> findResources(String name) throws IOException {
-        return ClassLoader.getSystemClassLoader().getResources(name);
-    }
-
     /**
      * All ClassLoaderValue are reset at run time for now. See also
      * {@link Target_java_lang_ClassLoader#classLoaderValueMap} for resetting of individual class

substratevm/src/com.oracle.svm.core/src/com/oracle/svm/core/jdk/JavaNetSubstitutions.java

@@ -26,10 +26,6 @@
 
 // Checkstyle: allow reflection
 
-import java.io.ByteArrayInputStream;
-import java.io.FileNotFoundException;
-import java.io.IOException;
-import java.io.InputStream;
 import java.net.MalformedURLException;
 import java.net.URL;
 import java.net.URLConnection;
@@ -58,6 +54,7 @@
 import com.oracle.svm.core.annotate.TargetClass;
 import com.oracle.svm.core.c.CGlobalData;
 import com.oracle.svm.core.c.CGlobalDataFactory;
+import com.oracle.svm.core.jdk.resources.ResourceURLConnection;
 import com.oracle.svm.core.option.OptionUtils;
 import com.oracle.svm.core.option.SubstrateOptionsParser;
 import com.oracle.svm.core.util.VMError;
@@ -240,31 +237,8 @@ static URLStreamHandler getURLStreamHandler(String protocol) throws MalformedURL
     static URLStreamHandler createResourcesURLStreamHandler() {
         return new URLStreamHandler() {
             @Override
-            protected URLConnection openConnection(URL url) throws IOException {
-                return new URLConnection(url) {
-                    private InputStream in;
-
-                    @Override
-                    public void connect() throws IOException {
-                        if (connected) {
-                            return;
-                        }
-                        connected = true;
-                        // remove "resource:" from url to get the resource name
-                        String resName = url.toString().substring(1 + JavaNetSubstitutions.RESOURCE_PROTOCOL.length());
-                        final List<byte[]> bytes = Resources.get(resName);
-                        if (bytes == null || bytes.size() < 1) {
-                            throw new FileNotFoundException(url.toString());
-                        }
-                        in = new ByteArrayInputStream(bytes.get(0));
-                    }
-
-                    @Override
-                    public InputStream getInputStream() throws IOException {
-                        connect();
-                        return in;
-                    }
-                };
+            protected URLConnection openConnection(URL url) {
+                return new ResourceURLConnection(url);
             }
         };
     }